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🎒 Pack light, live large — your adventure’s best-kept secret!
The Sea to Summit Ultra-Sil Day Pack is a 20L ultra-lightweight backpack crafted from durable, water-resistant 30D siliconized Cordura fabric. Weighing only 91 grams, it folds down to an egg-sized stuff sack for ultimate portability. Designed for day trips, hiking, and travel, it features a two-way zipper and a bike light attachment point, blending convenience with rugged performance for the modern adventurer.






















| ASIN | B0BVW9DPWZ |
| Age Range Description | Adult |
| Apparel Fabric Stretch | No Stretch |
| Apparel Fabric Weight Class | Lightweight |
| Backpack Design | Daypack Backpack |
| Best Sellers Rank | 17,627 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 146 in Internal Frame Camping & Hiking Backpacks |
| Brand Name | Sea to Summit |
| Care instructions | [NC] |
| Closure Type | Zipper |
| Colour | Spicy Orange |
| Customer Reviews | 4.2 out of 5 stars 249 Reviews |
| Embellishment Feature | Cord |
| Fabric Type | 100% Nylon |
| Fit Type | backpack |
| Fit to Size Sentiment | Neutral |
| Included Components | Components included in description |
| Item Dimensions D x W x H | 8D x 24W x 39H centimetres |
| Item Shape | Rectangular prism with modifications |
| Item Type Name | Mochila ULTRASIL roja |
| Item Weight | 91 g |
| Lining Description | Nylon |
| Manufacturer | SEA TO SUMMIT |
| Manufacturer Part Number | ATC012021-060811 |
| Material Type | Silicone-coated technical fabric (nylon or polyester) |
| Model Name | Mochila Ultrasil Roja |
| Model Number | ATC012021-060811 |
| Number Of Pockets | 1 |
| Number of Compartments | 2 |
| Number of Items | 1 |
| Other Special Features of the Product | Water Resistant |
| Outer Material Type | Man-made |
| Pattern | Solid |
| Pocket Description | Bag |
| Product Care Instructions | [NC] |
| Product Style | Rucksack |
| Recommended Uses For Product | Hiking, day trips, travel, outdoor activities |
| School Type | RM |
| Shell Type | Soft Shell |
| Size | 20 Litros |
| Sport Type | Hiking, Mountaineering |
| Storage Volume | 20 litres |
| Strap Type | Basic |
| Subject Character | Sports |
| Theme | Hiking |
| Unit Count | 1.0 count |
| Water Resistance Level | Water Resistant |
| Zippered Compartment Count | 1 |
C**S
Excellent for bike packing trips
Perfect for trips when you might need a pack from time to time - but not all the time. Packs really small and light. Feels delicate but seems ok in use. Have used for a couple of weeks on a bike tour - was great for visiting supermarkets but I was nervous about overloading it.
A**.
Comfortable and sturdy
While it is very thin and transparent, it’s remarkable how such a small pack size backpack can be so comfortable and sturdy. This has replaced my tote bag in my handbag and in my travel bag.
S**Y
Exactly as described
Great, lightweight spare travel pack
S**S
Very very thin.
Very small but the material is very thin almost transparent. Not sure how comfortable I would feel with anything of any value in there, particularly while wandering around cities. Other than that it's extremely light and packs down very small.
K**.
Poor quality
Very thin, almost see through. Very difficult to pack it back once unfolded. Not worth the price. Bear in mind that this is a third party company, they advertise a free returns option, but that’s not the case. Very misleading, avoid them!
M**Y
Superb
Great product! Strong, light packs down to nothing. Worth the money.
K**N
See through. You’d have to be kinda desperate …
It feels like the backpack equivalent of those raincoats that scrunch up into a tiny balls. I’m sure it does what it says but I didn’t much like it. If you’re stuck for a very see through backpack to squeeze into a corner of your luggage go for it but …. I haven’t used it and don’t plan to.
J**N
Rubust little bag
Very easy to use and holds quite a lot.
B**A
Tiny daypack
Ultra light, no frills day pack- easy to pack down into the drawstring bag
M**N
よい
軽くて生地・縫製もしっかりしています。 大満足です!
タ**マ
何処にでも何にでも使える
こんなに小さくでき、約15リットル入るデイパックはこれぐらいだと思います。 ブラックダイヤモンドのシラスはこれより軽く小さいみたいですが、あまり見かけなく値段も高いし容量も小さい。 よく中華製の同じ様な物もあるが、まず縫製がこちらのが頑丈に出来てます。 何回も使ってますが、縫ってる所がほつれて穴が空いた等は無いです。 中華製のはよく肩の付け根付近から破れてきます。 ファスナーはYKKの印字が無いので、YKKじゃないかもしれません。 生地が薄いので、あまり見られたく無い物等はポーチ等に入れた方が良いかもしれません。 収納時の小ささ、軽さ、背負い心地は最高です。 何かのバックに入れたり、カラナビでベルトループに付けたりと、何処にでも持って行けます。 軽さは七難隠す。 とは言いませんが、それぐらい軽さは重要だと思います。 お金に余裕があり、出来るだけ小さく収納でき、軽く、そこそこの容量のデイパックが欲しいなら、 これ一択です。
C**O
No me convence
Sinceramente me quedé un poco decepcionada. Ni es la mochila plegable más cómodo, se queda muy arrugada. Hmm como extra en el senderismo hay quizás modelos que pesan un pelín más y son más grandes pero tienen mucho más confort y para el día día hay modelos más pequeños y útiles. Creo que se vende mucho porque es un producto de una empresa famosa que también en otros momentos ya me decepcionó. Hay alternativas. Pero los materiales son de buenas calidad y parece muy resistente - eso sí: por eso 3 estrellas
Trustpilot
1 week ago
1 month ago