Travistello.
Official Sea to Summit Ultra-Sil Nano Poncho in Blue, showing its hood and loose rainwear shape
Sea to Summit, official product photography. Used for product identification and editorial analysis.

Sea to Summit · 118 x 0.3 x 140 cm, published order; packed13.5 x6.5 x6.5 cm

Sea to Summit Ultra-Sil Nano Poncho

A compact 15D nylon poncho with taped seams and side press studs. Published weight130g and packed weight145g stay separate; check actual fit and movement before using it as a city rain layer.

7.6/10 research score

Best for A compact occasional walking-day rain layer

Read the verdict

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

Weight
0.13 kg
Score
7.6/10

The short answer

Best for a compact occasional walking-day rain layer.

A compact optional rain layer when the loose shape, actual fit and access routine suit the outing. Consider an existing suitable jacket before adding it.

Why it stands out

  • Separate published weight and packed weight
  • Small published packed footprint
  • Taped seams and side press studs

Know before buying

  • Research-based evaluation; rain performance, comfort, fit and durability have not been physically tested by Travistello.
  • The nylon is not breathable; garment ventilation is a different property.
  • Manufacturer says this version cannot be used as a tarp.
  • Loose coverage requires an actual movement and fit check; no universal complete protection is established.

Travistello research score

7.6/ 10

Why it earned this score.

Research-based, using Travel Essentials Research Model v1.0. No physical test is implied.

01

Travel function

7.8

Defined rainwear role with taped seams and side closure; fit and actual weather protection remain user-dependent.

30% of overall score
02

Materials and care

7.6

Named15D nylon and taped seams; non-breathable fabric limits the material claim.

20% of overall score
03

Packed portability

8.7

Published130g weight,145g packed weight and compact13.5x6.5x6.5cm packed size support a small carry role.

20% of overall score
04

Value and ownership

6.6

ObservedUSD111.95 and conditional defect coverage; relatively high accessory cost and region-specific purchase route.

15% of overall score
05

Organization and fit

6.9

Loose cover and side studs offer a distinct carry/fit routine; body-specific fit not established.

15% of overall score

Normalized specifications

The facts, in comparable form.

Variant: Blue · SKU 180-32

Weight0.13 kg
External dimensions118 x 0.3 x 140 cm, manufacturer order, axes not labelled
Intended useOptional compact rainwear covering the wearer and a backpack when actual fit and conditions suit
OrganizationPacks into its own stuff sack; a loose outer layer, not a pocket organizer
Closure systemPress studs can close the sides; fully taped, double-stitched seams
Published materials100% nylon, 15D Ultra-Sil Nano fabric. Manufacturer waterproof construction claim; nylon is not breathable according to FAQ
Waterproof material claimYes
Warranty termsLimited lifetime manufacturing material/workmanship defect warranty for the intended usable life under normal use. Original owner and proof 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. Other stored products are not covered; regional policy applies.
Regional availabilityBlue available on US USD storefront; merchant states US and Canada shipping only, eligibility applies
Observed official priceUSD111.95, Blue, US storefront,14October2026
Packed dimensions13.5 x 6.5 x 6.5 cm, official Highlights
Packed weight145 g

Keep comparing

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Evidence & methodology

What we know, and what we do not.

A 0 to 10 research model for compact travel essentials and organizers. Travel function (30%), packed portability (20%), organization and fit (15%), materials and care (20%), and value and ownership (15%) are scored only from official published information. Manufacturer statements about waterproofing, leak resistance, protection, and durability remain attributed claims until Travistello tests them. Regional sales limits and conditional warranties lower the ownership score when they materially restrict who can buy or claim coverage.

EvaluationResearch-based
Reviewed14 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 14 October 2026; regional offers differ.

Official offerUS$111.95
View official product page ↗