Travistello.
Official Sea to Summit Ultra-Sil Dry Daypack in Blue Atoll, showing its roll-top closure and front compression lacing
Sea to Summit, official product photography. Used for product identification and editorial analysis.

Sea to Summit · 22L; 30 x 22 x 48 cm as published

Sea to Summit Ultra-Sil Dry Daypack

A 22L packable day backpack with taped seams, roll-top closure and a stated 110g weight. The manufacturer's heavy-rain claim excludes paddle sports and submersion.

7.4/10 research score

Best for Light day kits needing a qualified rain-protection design

Read the verdict

Research-based assessmentOfficial specifications and documented evidence. Not hands-on tested. Research score only. Not a Travistello Pick.

Weight
0.11 kg
Score
7.4/10

The short answer

Best for light day kits needing a qualified rain-protection design.

A light day-bag option when the manufacturer's qualified rain-protection design suits the outing. Allow for roll-top access and keep paddle sports and submersion outside its role.

Why it stands out

  • Published open and packed dimensions
  • Taped seams and double roll-top
  • Explicit heavy-rain and submersion boundaries

Know before buying

  • Research-based evaluation; loaded comfort, weather protection and durability have not been physically tested by Travistello.
  • Not intended for paddle sports or submersion; no IP rating or device-protection guarantee established.
  • Bag and straps are not padded; above 7kg manufacturer advice concerns short durations.
  • Technical table lists polyester zipper without specifying its role; main closure is roll-top.

Travistello research score

7.4/ 10

Why it earned this score.

Research-based, using Packable Day Bag Research Model v1.0. No physical test is implied.

01

Access and organization

6.5

Roll-top access and front lacing are documented, with minimal separated storage.

25% of overall score
02

Portability

8.5

Published 110g weight and pack-down footprint support a light backup role with 22L capacity.

25% of overall score
03

Carry design

6.6

Non-padded bag and straps are explicit. Heavy-load guidance limits longer carry.

20% of overall score
04

Ownership

7.5

Exact regional offer and conditional warranty are stated. Extra weather construction has a higher observed price.

15% of overall score
05

Materials and closure

8.0

Taped seams and roll-top underpin the qualified manufacturer rain claim, with clear exclusions.

15% of overall score

Normalized specifications

The facts, in comparable form.

Variant: 22L / Blue Atoll · SKU 280-33

Weight0.11 kg
Capacity22 L
External dimensions30 x 22 x 48 cm as published; axis order is not labelled
Day bag organizationMain roll-top compartment, front compression lacing, attached stuff sack and aluminium carabiner; no padded camera compartment established
Closure systemDouble non-wicking roll-top main closure and tape-sealed seams
Carry designNon-padded pack and shoulder straps. Manufacturer advises loads above 7kg only for short durations; no universal comfortable load inferred
Published weather claimManufacturer says it withstands heavy rain; not intended for paddle sports or situations where the pack is submerged. Follow closure instructions
Published materialsBody 100%nylon and stuff sack 100%nylon; 30D siliconised high-tenacity CORDURA. Technical table also lists zipper 100%polyester without specifying its role
Packed dimensions5.3 x 14.3 x 19 cm as published, attached storage sack
Packed weight110 g
Regional availabilityExact Blue Atoll variant observed in stock on US USD store; shipping eligibility and totals may change
Warranty termsLimited lifetime warranty against manufacturing material/workmanship defects for the intended usable life of the product under normal use. Original owner and proof of purchase from Sea to Summit or an authorized reseller required. Improper care/use, accident, negligence, normal wear and age/environmental degradation excluded. Remedy limited to repair, replacement or credit; regional policy applies.
Observed official priceUSD 69.95 on 12 October 2026, US storefront, Blue Atoll, no discount applied

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Evidence & methodology

What we know, and what we do not.

A research-based 0 to 10 model for packable day bags in creator gear. Portability (25%), access and organization (25%), carry design (20%), materials and closure (15%), and ownership (15%) assess published manufacturer features. Scores describe documented design trade-offs, not measured carrying comfort, waterproofness, loaded fit or durability. Personal-item compliance always depends on the airline and packed dimensions.

EvaluationResearch-based
Reviewed12 October 2026
Physical testNot yet conducted

Primary evidence

Commercial disclosure. Official non-affiliate link to Sea to Summit US. No commission is earned through this link. Price and selected-variant availability were observed on 12 October 2026; regional offers differ.

Official offerUS$69.95
View official product page ↗