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MARGO
3RD ROCK Margo climbing and adventure trousers - Jerome is 5ft 10" with a 31" waist & 38" hips. Here he is wearing a size 32RL.
MARGO
MARGO
3RD ROCK Margo organic cotton climbing and adventure trousers - Jess is 5ft 8” with a  29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL.
3RD ROCK Margo organic cotton outdoor trousers - Jerome is 5ft 10" with a 31" waist & 38" hips. Here he is wearing a size 32RL.
MARGO
3rd rock margo trousers close up on our calf logo
MARGO
MARGO
3RD ROCK sustainable adventure margo trousers. F
3RD ROCK sustainable rock climbing trousers . F
MARGO
3rd rock sustainable outdoor margo trousers - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
3RD ROCK Margo climbing and adventure trousers - Jess is 5ft 8” with a  29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL.
3RD ROCK Margo organic cotton adventure trousers - Jerome is 5ft 10" with a 31" waist & 38" hips. Here he is wearing a size 32RL.
3rd rock clothing margo pants - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
MARGO
3rd rock outdoor clothing margo trousers in yellow - Jess is 5ft 8” with a 29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL. F
3rd rock clothing margo trousers unisex style in our shark colour - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
MARGO
3RD ROCK Margo purple womens climbing trousers - Jess is 5ft 8” with a  29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL.
3rd rock clothing margo trousers - Jess is 5ft 8” with a 29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL. F
3rd rock clothing margo trousers in honey badger - Jess is 5ft 8” with a 29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL F
3rd rock clothing margo trousers for active lifestyles - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
MARGO
MARGO
Model Info
3RD ROCK Margo climbing and adventure trousers - Jerome is 5ft 10" with a 31" waist & 38" hips. Here he is wearing a size 32RL.
Model Info
MARGO
Model Info
MARGO
Model Info
3RD ROCK Margo organic cotton climbing and adventure trousers - Jess is 5ft 8” with a  29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL.
Model Info
3RD ROCK Margo organic cotton outdoor trousers - Jerome is 5ft 10" with a 31" waist & 38" hips. Here he is wearing a size 32RL.
Model Info
MARGO
Model Info
3rd rock margo trousers close up on our calf logo
Model Info
MARGO
Model Info
MARGO
Model Info
3RD ROCK sustainable adventure margo trousers. F
Model Info
3RD ROCK sustainable rock climbing trousers . F
Model Info
MARGO
Model Info
3rd rock sustainable outdoor margo trousers - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
Model Info
3RD ROCK Margo climbing and adventure trousers - Jess is 5ft 8” with a  29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL.
Model Info
3RD ROCK Margo organic cotton adventure trousers - Jerome is 5ft 10" with a 31" waist & 38" hips. Here he is wearing a size 32RL.
Model Info
3rd rock clothing margo pants - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
Model Info
MARGO
Model Info
3rd rock outdoor clothing margo trousers in yellow - Jess is 5ft 8” with a 29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL. F
Model Info
3rd rock clothing margo trousers unisex style in our shark colour - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
Model Info
MARGO
Model Info
3RD ROCK Margo purple womens climbing trousers - Jess is 5ft 8” with a  29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL.
Model Info
3rd rock clothing margo trousers - Jess is 5ft 8” with a 29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL. F
Model Info
3rd rock clothing margo trousers in honey badger - Jess is 5ft 8” with a 29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL F
Model Info
3rd rock clothing margo trousers for active lifestyles - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
Model Info
MARGO
Model Info

MARGO

Performance stretch twill trouser

Regular price £68.00 Sale price £80.00
On Sale
NEW DROP!

Tax included

Theme

Colour: Nori
Size

Choose which size guide you'd like!

Women

Bottoms

Short leg: 30 inches
Regular leg: 32 inches
Long leg: 34 inches

Previously labelled Size label Waist Hips
XXS
24"/UK 6
24

33
XS
26"/UK 8
26
35

S

28"/UK 10

28
37
M
30"/UK 12
30

39

L

32"/UK 14
32
41
XL
34"/UK 16

34

43

XXL
36"/UK 18
36
45

Short leg: 76.2cm
Regular leg: 81.3cm
Long leg:86.4cm

Previously labelled Size Label Waist Hips
XXS
24"/UK 6
61
84
XS
26"/UK 8
66
89.1
S
28"/UK 10
71.2
94.2
M
30"/UK 12
76.2
99.2
L
32"/UK 14

81.3
104.3
XL
34"/UK 16
86.4
109.4
XXL
36"/UK 18
91.5

Tops

Size Chest/Bust Underbust Waist
XXS/UK 6
30
24-26
24
XS/UK 8
32
26-28
26
S/UK 10
34
28-30
28
M/UK 12
36
30-32
30
L/UK 14
38
32-34
32
XL/UK 16
40
34-36
34
XXL/UK 18
42
36-38
36
Size Chest/Bust Underbust Waist
XXS/UK 6
76.5
61-66
61
XS/UK 8
81.6
66-71
66
S/UK 10
86.7
71-76
71
M/UK 12
91.7
76-81.5
76
L/UK 14
96.8
81.5-86.5
81
XL/UK 16
101.9
86.5-91.5
86
XXL/UK 18
107.0
91.5-96.5
91

Men

Bottoms

Short leg: 30 inches
Regular leg: 32 inches
Long leg: 34 inches

Size Waist Hips
26"/XXS
26
32
28"/XS
28
34
30"/S
30
36
32"/M
32
38
34"/L
34
40
36"/XL
36
42
38"/XXL
38
44

Short leg: 76.2cm
Regular leg: 81.3cm
Long leg:86.4cm

Size Waist Hips
26"/XXS
66.0
81.3
28"/XS
71.1
86.4
30"/S
76.2
91.4
32"/M
81.3
96.5
34"/L
86.4
101.6
36"/XL
91.4
106.7
38"/XXL
95.5
111.8

Tops

Size Chest/Bust Waist
XXS
33
26
XS
35
28
S
37
30
M
39
32
L
41
34
XL
43
36
XXL
45
38
Size Chest/Bust Waist
XXS
84
66
XS
88.9
71.1
S
94.0
76.2
M
99.1
81.3
L
104.1
86.4
XL
109.2
91.4
XXL
114.3
96.5
Find your size
Leg Length
Your purchase helps fund responsible reforestation and ecosystem restoration projects worldwide. We support community-led initiatives where the right trees are planted in the right places and protected for the future.
Visit our virtual forest
Forest reforestation initiative
Tree icon
So far we've funded
0 trees through our
partnership with Ecologi

Complete the look

3RD ROCK clothing sustainable buttoned shirt - Jerome is 5ft 10 3RD ROCK clothing active buttoned flannel shirt - Jerome is 5ft 10

RANGER SHIRT

Tech-driven Active Shirt
£63.75 £75.00

RANGER SHIRT

RANGER SHIRT
3RD ROCK unisex tee with our sun print logo - Aaliyah is 5ft8 3RD ROCK Clothing unisex tee made with organic cotton - Donald is 6ft 1″  with a 40

UNISEX TEE

Organic cotton tee with sun print

+ More options

 £15.00 £30.00

UNISEX TEE

UNISEX TEE

Why we made it

Say hello 👋 to our performance driven Margo trousers! We’re talking super stretchy, tough-as-nails trousers that actually keep up with you! 💪

Perfect for climbing, scrambling, hiking and any other adventures you find yourself on! ⛰️

Margo has become one of our icons thanks to the stretch waistband, tapered legs, movement enhanced design, and organic cotton. Not to mention the GORGEOUS new colours! 💜💚

Adventure-ready trousers that are planet friendly? Hell yeah! 🌍

Why you'll love it
  • Elasticated waistband with internal puller cord for ultimate comfort
  • Our signature diamond crotch for unrestricted movement
  • Cinched ankles to enhance foot placement visibility
  • Zipped back pocket for secure storage
  • Extra knee darts for added flexibility
  • Unisex fit suitable for all adventurers
  • Made with organic cotton woven twill with elastane for stretch
  • Sustainable choice for eco-conscious individuals
  • Flattering, versatile slim tapered cut
  • 4-way stretch fabric for ultimate freedom of movement

Size & Fit

Jerome is 5ft 10" with a 31" waist & 38" hips. Here he is wearing a size 32RL.

Jess is 5ft 8” with a  29" waist, 38" hips & a 32.5" inseam and is wearing a size 28RL

Donald is 6ft 1″  with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL

Aaliyah is 5ft 8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL

Fabric & care

98% Organic Cotton 2% Elastane

Save the climate and wash cold/line dry.
Avoid fabric conditioner and separate colours. 

Shipping & Delivery
UK
  • Royal Mail 48 hours: £3.50
  • Royal Mail 24 hours: £4.50
  • Next Day delivery: £8.50

Free UK Shipping over £90.

Please note: Next day delivery to Northern Ireland is not guaranteed.
EU

Rates start from €3.99 and don't normally exceed €9.99. Weight can also affect the delivery rate charged.

Free EU Shipping over €150. 

Orders under €150 will be sent via IOSS though 3RD ROCK takes no responsibility for any local fees incurred
Rest of world

Rates vary depending on country, parcel weight and method. Shipping rates don't generally exceed £15.99

Free ROW shipping on orders over $200

3RD ROCK takes no responsibility for any local fees incurred.

MARGO IN THE WILD

Sustainably 3RD ROCK

Sustainability

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Manufacturing

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Materials & fibres

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Design & concepts

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