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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
3rd rock sustainable denim unisex mars jeans - Aaliyah is 5ft 8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL. F
3RD ROCK sustainable unisex movemet jeans - Donald is 6ft 1″  with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
3RD ROCK sustainable denim jeans - Aaliyah is 5ft8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL. F
3RD ROCK sustainable movement jeans - Aaliyah is 5ft8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL. F
Have you seen our cheeky little message we add to the zipper on our jeans?
3RD ROCK sustainable jeans made with stretchy elastane - Donald is 6ft 1″  with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
3rd rock sustainable denim jeans are calling, nature calls
3rd rock sustainable denim unisex mars jeans with our signature back pocket logo. F
3RD ROCK sustainable denim jeans for climbing & chilling - Aaliyah is 5ft8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL. F
3rd rock sustainable denim unisex mars jeans - Aaliyah is 5ft 8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL F
3RD ROCK sustainable organic cotton jeans - Donald is 6ft 1″  with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
3rd rock unisex mars climbing and active jeans - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
A close up photo of our kne darts, which allow extra range of motion when climbing, scrambling or walking
3rd rock sustainable denim unisex mars jeans - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
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
Model Info
3rd rock sustainable denim unisex mars jeans - Aaliyah is 5ft 8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL. F
Model Info
3RD ROCK sustainable unisex movemet jeans - Donald is 6ft 1″  with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
Model Info
3RD ROCK sustainable denim jeans - Aaliyah is 5ft8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL. F
Model Info
3RD ROCK sustainable movement jeans - Aaliyah is 5ft8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL. F
Model Info
Have you seen our cheeky little message we add to the zipper on our jeans?
Model Info
3RD ROCK sustainable jeans made with stretchy elastane - Donald is 6ft 1″  with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
Model Info
3rd rock sustainable denim jeans are calling, nature calls
Model Info
3rd rock sustainable denim unisex mars jeans with our signature back pocket logo. F
Model Info
3RD ROCK sustainable denim jeans for climbing & chilling - Aaliyah is 5ft8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL. F
Model Info
3rd rock sustainable denim unisex mars jeans - Aaliyah is 5ft 8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL F
Model Info
3RD ROCK sustainable organic cotton jeans - Donald is 6ft 1″  with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
Model Info
3rd rock unisex mars climbing and active jeans - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
Model Info
A close up photo of our kne darts, which allow extra range of motion when climbing, scrambling or walking
Model Info
3rd rock sustainable denim unisex mars jeans - Donald is 6ft 1″ with a 30" waist, 36" hips & a 33" inseam and is wearing a size 30LL. M
Model Info

MARS

Classic straight leg jeans

Regular price £76.50 Sale price £90.00
On Sale

Tax included

Denim colour

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

Why we made it

Howdy partner! 🤠 Need a pair of jeans that are versatile enough to keep up with wrangling cattle and your incredibly advance line-dancing skills? 👖

Luckily for you we’ve got the rootin’ tootinest jeans you’ll ever find right here! Made with the stretchiest denim you can get your hands on and classic styling to blend in at any hoedown - the Mars are as ready party as you are!

Made with knee darts, four-way stretch Ecomorph 3.0 denim & signature diamond crotch - these Jeans are totally zero restriction! 

We’ve also designed Mars to provide looser, more spacious fit around the thigh & calf areas. Perfect for if you want to wear your jeans over your cowboy boots! 👢

We've also reinforced belt loops, and of course added our cheeky little message on the fly opening! 😉

These jeans will make you scream YEEEHAAWWW - don’t judge us we’ve been watching Yellowstone… 🤠

Why you'll love it
  • Tailored to a classic straight leg
  • Made with organic cotton & lycra for stretch
  • Single knee darts for extra space
  • Four-way stretch durable Eco denim
  • Diamond cut crotch
  • Reinforced belt loops & elasticated waistband
  • No animal products used & a FSC certified recycled card jeans patch
  • Zipper/Fly opening with a cheeky little message 😉

Size & Fit

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

Aaliyah is 5ft8" with a 26" waist, 35" hips & a 33" inseam and is wearing a size 26RL

Fabric & care

96% Organic Cotton 4% Lycra
4 Way Stretch

Save the climate and wash cold
Avoid fabric conditioner
Wash with similar colours

Shipping & Delivery
UK
  • Royal Mail 48 hours: ÂŁ3.50
  • Royal Mail 24 hours: ÂŁ4.50
  • Next Day delivery: ÂŁ8.50

Free UK Shipping over ÂŁ90.

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 ÂŁ15.99

Free ROW shipping on orders over $200

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

MARS 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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