CALPAK Luka Duffel Bag

The 20L is the right choice for most people. It covers the three most common duffel use cases: gym bag (full kit, trainers, towel, toiletries), commuter bag (laptop in a sleeve, daily essentials, lunch), and weekend trip (2–3 nights with efficient rolling-packing). It qualifies as an airline personal item. It's the version that most people who buy it mean when they say "the Luka." At 1.1 lbs empty, it's light enough to carry all day without fatigue.

Choose the 35L if: you need a dedicated padded laptop sleeve (the 35L includes one for up to 15"); you're packing for 4+ nights and don't want to check a bag; or you want to use the bag as an overhead carry-on bin item rather than an under-seat personal item. The 35L costs $118 (regular $148) and weighs 1.4 lbs empty. Note that the 35L is too large for under-seat personal-item carry on any major airline — if you're planning to use it as your only bag on a flight, it will need to go in the overhead bin (where it qualifies as a carry-on). See the full Luka collection at calpaktravel.com/collections/luka-duffel.

Yes, with one important caveat. The Luka's U-shaped opening gives full access to the main compartment — you can see and reach everything without unpacking, which is genuinely convenient in a gym locker. The water-resistant exterior handles gym-bag condensation (from a wet swimsuit or damp towel) and sweaty gym floors better than uncoated canvas bags. The 20L comfortably fits a full gym kit: trainers (packed toe-to-heel), change of clothes, towel, and a standard dopp kit toiletry bag.

The caveat: the bag has no internal structure and no ventilated shoe compartment. Without a base board or shoe pocket, your trainers go in the main compartment with your clothes — not ideal if your shoes are dirty or damp after a workout. For pure gym use, bags with a dedicated shoe or wet pocket (like the Béis Sport Duffel) have an organisation advantage. The Luka is better framed as a gym-to-work-to-travel bag that can handle gym use, rather than a dedicated gym bag. If your gym kit goes straight back into the bag unwashed and lives in the car boot, a more ventilated or wipe-clean bag may suit you better. See our gym bag reviews for alternatives if the Luka's gym organisation doesn't match your routine.

Buy the CALPAK Luka if: the luggage sleeve is important to you (it's the best implementation at any price under $150), you want the widest colourway selection, or you need the lightest possible bag at this capacity. The Luka is also the best value among the three — it delivers the features that matter most for gym-to-travel daily carry at a lower price than Béis and with better travel functionality than Herschel.

Buy the Béis Sport Duffel if: organisation depth is your priority — three exterior pockets (including a dedicated side water-bottle pocket and a back slip pocket), a padded 15" laptop sleeve, and a dedicated shoe/wet pocket make the Béis significantly better organised. At $128 it's $40 more than the Luka, and the extra cost buys real functionality if you regularly carry a laptop and need quick access to multiple categories. Buy the Herschel Novel if: budget is the primary factor and you don't need a luggage sleeve — the Novel ($55–$70) is a reliable, well-built basic duffel that covers gym and weekend use without frills. Its canvas exterior is heavier and less water-resistant than coated nylon, but the brand's build quality is consistent and the price is hard to beat for casual use. See our full duffel bag reviews for the complete comparison.

CALPAK offers a 30-day return window from the date of purchase on orders placed through calpaktravel.com. Items must be unused and in original packaging with tags attached. Returns are free for US customers — CALPAK provides a prepaid return label. International returns are the customer's responsibility for return shipping costs. For purchases through Amazon, Nordstrom, or other retailers, the retailer's own return policy applies — Nordstrom's policy (free returns in-store, no time limit for most items) is the most generous option if you're buying the Luka as a gift or are unsure about the colourway.

On warranty: CALPAK backs the Luka with a 1-year limited warranty against manufacturing defects in materials and workmanship. Zipper failure, strap hardware breakage, and seam separation under normal use are covered. Normal wear to the exterior fabric surface and accidental damage are not. To initiate a warranty claim, contact CALPAK's customer support at calpaktravel.com/pages/contact with proof of purchase and photos of the defect. Claims are typically processed within 5–7 business days, with replacement bags shipped at no additional cost if the claim is approved.