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Ultralight Ski Backpacks
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- Black DiamondCirque Ultra 35 Pack$399.95(3)3 reviews with an average rating of 4.7 out of 5 starsGear Capacity:35 litersWeight:2.31 lbs
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Related Expert Advice articles
Consider your main activity:
- Hiking: Compatible with hydration reservoirs; some have straps or loops to attach trekking poles or other gear.
- Running: Designed to limit bounce; compatible with water bottles or hydration reservoirs.
- Climbing: Slim profile with abrasion-resistant reinforcements.
- Traveling: Has compartments for easy organization; many meet carry-on size requirements.
How much gear will you carry?
- 20L or less: Ideal for short runs, day hikes or quick outings.
- 21–35L: The sweet spot for hiking and travel.
- 36–50L: Best for extended trips or adventures requiring more gear or clothing.
Find the right fit:
- Daypacks are available in a range of sizes.
- Check your torso length and waist against the brand's size chart for the best fit.
- Many packs feature adjustable torso lengths to fine-tune your fit.
Our testers spent months putting the best hiking and backpacking boots sold at REI through their paces. These 9 are the best hiking, thru-hiking and backpacking boots.
Learn the differences between hiking shoes and hiking boots with Expert Advice from REI and find the perfect trail shoe for your needs.
Read full article: Hiking Boots vs. Hiking Shoes: What’s the Difference?
Whether hiking, biking or hanging out, protecting your eyes from sunlight is essential, even on cloudy days. Check out our staff and REI Co-op Members' 9 favorite sunglasses of 2025.
Read full article: The 8 Best Sunglasses of 2025: Staff Picks
Choose a pant fit
- Standard: consistent width from top to bottom
- Slim: tighter to the leg
- Relaxed or wider: fits loosely throughout the thighs, knees and calves
What material do you prefer?
- Synthetic
- Polyester: affordable, stretchy, doesn't wrinkle
- Nylon: durable, abrasion-resistant, less stretch
- Spandex: stretchy, moves easily, less breathable
- Natural fibers
- Cotton: durable, breathable, dries slowly
- Wool: stretchy, durable, odor-resistant, pricier
- Hemp: durable, renewable, can feel rougher
Consider additional features like:
- Moisture wicking: moves moisture (namely, sweat) to the outer surface while also drying quickly
- Pockets: help carry items you want to have accessible
- Sun-protective fabric: a higher UPF rating provides better sun protection
- Convertible: can be worn full-length or as shorts
- Insect repellent: pants treated with insect-repellent coatings can help keep pests off
Our comprehensive checklists for day hikers features required and optional gear, clothing and accessories.

