Sea to Summit Ultra-Sil Nano Daypack
Backup daypack that has replaced every disposable shopping bag on trips for us.
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The rating, unpacked
Our overall rating is the weighted average of these sub-scores. Category-specific criteria appear alongside the universal ones — no black boxes.
The wider verdict
"Weighs less than a phone, holds more than a shopping trip."
Pros
- Packs into its own pocket
- 18L capacity, weighs 68g
- Lifetime warranty
Cons
- Thin fabric — not for sharp gear
- Straps aren't padded
Full specs
- Best for
- Travellers who want a spare pack that vanishes into checked luggage.
- Material
- Cordura Ultra-Sil recycled nylon
- Weight
- 68 g
- Insulated
- Leakproof
- Dishwasher safe
- BPA-free
- Recyclable
- Recycled content
- 30%
- Country of origin
- Vietnam
- Warranty
- Lifetime
How we scored it
Our overall rating blends five weighted factors — materials & construction, everyday usability, durability & longevity, sustainability credentials, and value for money — with small category-specific tweaks (insulation performance for drinkware, grip and cushion for yoga, seal integrity for food storage). The sub-scores above are the rating; we then cross-check it against independent reviews from outlets like Wirecutter, The Guardian and Choice. If a spec, price, or long-term report changes, we update the record and re-score.