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Description
MOLECULE 45The Molecule 45L is a lightweight, modular backpack designed for experienced hikers, trekkers, and travelers who are ready to embrace ultralight gear. Combining comfort, durability, and versatility, this pack is ideal for everything from weekend adventures to cross continental treks. Its innovative features, modular design, and eco friendly materials make it a standout choice for serious outdoor enthusiasts. Key Features: Lightweight and Durable
The Molecule 45L is a lightweight, modular backpack designed for experienced hikers, trekkers, and travelers who are ready to embrace ultralight gear. Combining comfort, durability, and versatility, this pack is ideal for everything from weekend adventures to cross-continental treks. Its innovative features, modular design, and eco-friendly materials make it a standout choice for serious outdoor enthusiasts.
Key Features:
Lightweight and Durable Construction
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Materials:
- Bottom shell: Reinforced 500D CORDURA® Nylon for maximum durability.
- Main shell: 210D Ripstop Robic Nylon (100% recycled, Blue Sign® approved) for lightweight strength.
- Eco-friendly with PFC-free DWR and recycled materials in the shell, lining, and webbings.
Smart Storage and Organization
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Capacity:
- Short: 41L
- Regular: 45L
- Long: 49L
- Expandable Volume: Roll-top closure with a zipper allows for an additional 10L of gear storage.
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Pockets:
- Two stretch side pockets made of durable Power Mesh for water bottles or gear.
- Top pocket with a key clip for secure access to essentials.
- Shoulder pocket for a 0.5L bottle, snacks, or a phone.
- Removable hip belt with stretch mesh and water-resistant pockets.
- Hydration Compatibility: Internal hydration sleeve for easy water storage.
Modular Design for Customization
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Compression Straps:
- Side compression straps can be secured over the front or removed entirely for a streamlined look.
- Four daisy chains allow versatile placement of compression straps for secure packing.
- Removable top compression strap for additional load management.
Comfortable and Ergonomic Fit
- Backpanel: Close-fitting padded back panel with a ventilation air channel and breathable mesh for dynamic comfort.
- Straps: Padded shoulder straps with quick-adjust chest straps for a secure and comfortable fit.
- Adjustable Sizing: Available in short, regular, and long back lengths to suit all users (S: 54cm, R: 60cm, L: 67cm).
Performance Specifications
- Recommended Load: 8–18kg for optimal comfort and stability.
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Weight:
- Short: 1110g
- Regular: 1190g
- Long: 1270g
Eco-Friendly Features
- PFC-free durable water repellency for sustainable weatherproofing.
- Made with 100% recycled shell, lining, and webbings to minimize environmental impact.
The Molecule 45L combines lightweight performance with a user-friendly modular design, ensuring versatility and functionality for any outdoor activity. Whether you’re embarking on a short weekend hike or a long-distance trek, this ultralight backpack delivers exceptional comfort, smart organization, and durable construction.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 3
Not what I’d hoped
Color: Multicolor a (5-pack), Size: Small
The fabric is nice, soft without being overly bulky. The design was almost what I wanted. I’ve been trying to find underwear that won’t ride up and is comfortable to wear under leggings. The fabric has a LOT of stretch around the legs and deforms quickly. Then it rides up and wrinkles. Smaller leg openings might make the difference.
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Reviewed in the United States on April 1, 2026
★★★★★ 4
Great & Comfortable
Color: Multicolor B (5-pack), Size: X-Large, Color: Multicolor B (5-pack), Size: X-Large
I have bought 2 packs of this underwear. I love wearing them. They are very comfortable, and the size fits perfectly. I like most of the colors. The Bamboo Cool lettering on the front does come off after washing though. Otherwise the underwear has been great to wear.
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Better than woxer imo
Color: Multicolor B (5-pack), Size: Large
I've been buying Woxers, but theyre super expensive for what youre getting. These are similar in feel and style so i switched over. Another nice thing is i dont have to deal with wedgies like i do with the woxers.
Theyre not perfect for wearing when its hot, youre still gunna sweat and these dont wick away sweat super well. But i havent seen many brands that do, and these are not the worst.
Im 5'7" and 145lbs and these are comfy and tight enough but not snug. They still leave a bit of indentation on the love handles. You CAN tell that youre wearing them under pant if they are tight.
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Reviewed in the United States on May 11, 2026
★★★★★ 5
Super soft and comfortable!
I haven't bought new underwear in forever. I used to wear thongs, but now find them incredibly uncomfortable. The last few times I've tried to buy new underwear, the sizing was either way off (I'm a medium, but gave up after having to return them for a large and then extra large) or the quality was horrible (two brands stretch waaaay out and they can fall down while wearing them (I have larger ass-ets, so they shouldn't start to slide down during use). I tried these after buying some bamboo pyjamas and I love them! They are incredibly soft, comfortable, and stretchy. I can use them all day, and they work well, whether I'm lounging on the couch or wearing them under my spandex shorts at the gym, they don't ride up or slide down. They are both comfortable and look sexy, while providing support in all the right places. I haven't had them too long, so I can't speak on the durability, but they appear to be of good quality and I plan to order more, this time without the band.
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Reviewed in the United States on November 13, 2025
★★★★★ 5
Well made, light fabric. Waist doesn't roll.
These bamboo underwear really do keep you cool.
They fit true to size, and wear easily. the wide elastic waist band doesn't roll on me.
They are comfortable to wear, washed and dried easily.
The material has some stretch to it, but not a lot.
Well made, no stray strings. Perfect fit for me.
Just what I was looking for.
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Reviewed in the United States on May 17, 2026