# Ultra-Sil Compression Sack (Like New)

> Ultra-Sil Compression Sack (Like New) by Sea to Summit costs $19.98 for Color: High Rise Grey, Size: 8 liter at Sea to Summit, the brand's official store, as of October 18, 2026. Returns: 60 days from purchase to request a return; opened or used items are not accepted; excluded: final sale. Checkout happens on the seller's own store; Coreplex adds no fees.

## At a glance

| Field | Value |
| --- | --- |
| Brand | Sea to Summit |
| Sold by | Sea to Summit (the brand's official store) |
| Price | $19.98 for Color: High Rise Grey, Size: 8 liter |
| Price checked | October 18, 2026, before tax and shipping. The live page and the seller's store have the current price. |
| Availability | In stock at the seller when checked |
| Condition | new |
| Color options | Atoll Blue, High Rise Grey, Zinnia Yellow |
| Size options | 8 liter, 13 liter (sold out), 20 liter (sold out), 35 liter (sold out) |
| Rating | 5.0 of 5 from 2 reviews on the seller's store |
| Shopify catalog ID | 3KFmi7m5QDbyWyiKNGkJlp |

Buy at Sea to Summit: https://seatosummit.com/products/ultra-sil-compression-sack-used

## Shipping and returns

Returns, refunds and shipping follow Sea to Summit's own policy, not Coreplex's.

In short: 60 days from purchase to request a return; opened or used items are not accepted; excluded: final sale.

| Term | Policy | Exact wording |
| --- | --- | --- |
| Return window | 60 days | "You can return an item for a full refund within 60 days of your purchase date." |
| Window counts from | purchase | "You can return an item for a full refund within 60 days of your purchase date." |
| Item condition | unused, original packaging | "All items must be returned in the original, unused condition and must include all original packaging." |
| Opened items | not accepted | "If you are doing a return and the original card you used to purchase the item is no longer in working order the refund will still post to the account associated with the credit card." |
| Not returnable | final sale | "Final sale items cannot be returned." |
| Refund goes to | original payment method | "Please allow 7-10 days for refunds to process through your original form of payment." |
| Refund timing | 60 days | "You can return an item for a full refund within 60 days of your purchase date." |

Read from the seller's refund policy on 2026-10-18.

- Refund policy: https://checkout.shopify.com/24672501/policies/1317961756.html
- Shipping policy: https://checkout.shopify.com/24672501/policies/25417351341.html

## Other stores selling it

Coreplex counts another listing as the same item only when it shares a Shopify catalog ID or barcode; lookalikes are never priced as equals. Live check: https://coreplex.ai/p/seatosummit.com/ultra-sil-compression-sack-used · MCP: get_passport / compare_prices with product_url https://seatosummit.com/products/ultra-sil-compression-sack-used

## What Sea to Summit says

When you need to compress volume without significantly adding weight, the Ultra-Sil Compression Sack is an excellent solution. Made from a water-resistant, bluesign® approved Ultra-Sil 30D nylon fabric with Non-PFC DWR this compression sack is far tougher than its weight would suggest. Ideal for use inside your pack or travel bag when you need to compress clothing or bulky soft items to allow space for other essentials or fun holiday items. Features Compress soft contents down by as much as two thirds Side-release buckle compression straps for fast and easy access Water-resistant, bluesign® APPROVED Ultra-Sil 30D Nylon fabric with a non-PFC DWR finish Three ultralight compression straps with two ladderlock and one side-release buckles allows easy access and reduces weight Attached flip-top lid prevents straps tangling

## Materials (from the seller's page)

Sack: 100% Nylon; Buckles: 100% POM; Webbing: 100% PP Hydrostatic Head 2000 mm 5 liter High Rise Grey 5 liter Atoll Blue 5 liter Zinnia Yellow 8 liter High Rise Grey 8 liter Atoll Blue 8 liter Zinnia Yellow 13 liter High Rise Grey 13 liter Atoll Blue 13 liter Zinnia Yellow 20 liter High Rise Grey 20 liter Atoll Blue 20 liter Zinnia Yellow 35 liter High Rise Grey 35 liter Atoll Blue 35 liter Zinnia Yellow Weight 53 g 1.9 oz 53 g 1.9 oz 53 g 1.9 oz 64 g 2.3 oz 64 g 2.3 oz 64 g 2.3 oz 82 g 2.9 oz 82 g 2.9 oz 82 g 2.9 oz 96 g 3.4 oz 96 g 3.4 oz 96 g 3.4 oz 118 g 4.2 oz 118 g 4.2 oz 118 g 4.2 oz

## Dimensions (from the seller's page)

15.2 × 15.2 × 29.6 cm 6 × 6 × 12 in 15.2 × 15.2 × 29.6 cm 6 × 6 × 12 in 15.2 × 15.2 × 29.6 cm 6 × 6 × 12 in 18.1 × 18.1 × 35.5 cm 7 × 7 × 14 in 18.1 × 18.1 × 35.5 cm 7 × 7 × 14 in 18.1 × 18.1 × 35.5 cm 7 × 7 × 14 in 20.5 × 20.5 × 43.3 cm 8 × 8 × 17 in 20.5 × 20.5 × 43.3 cm 8 × 8 × 17 in 20.5 × 20.5 × 43.3 cm 8 × 8 × 17 in 24 × 24 × 47.5 cm 9 × 9 × 19 in 24 × 24 × 47.5 cm 9 × 9 × 19 in 24 × 24 × 47.5 cm 9 × 9 × 19 in 28.8 × 28.8 × 57.8 cm 11 × 11 × 23 in 28.8 × 28.8 × 57.8 cm 11 × 11 × 23 in 28.8 × 28.8 × 57.8 cm 11 × 11 × 23 in Imperial Metric Blog Sea to Summit Blog Read article The Art of Slowing Down - Bikepacking Through Andalusia Read article Explorer Tales: Exclusive Interview with Adventurer and Founder of Videography Studio, Pillar Creative Read article Explorer Tales: Exclusive Interview with Californian Photographer and Adventurer, Teagan Maddux View blog

## Key features (from Shopify's product catalog)

- Compresses soft contents by up to two-thirds for efficient packing
- Side release buckle compression straps enable fast and easy access
- Water resistant Bluesign approved ultra sil 30D nylon fabric protects items from moisture
- Non-PFC DWR finish offers eco-friendly water repellency
- Attached flip top lid prevents strap tangling for hassle-free use

| Spec | Value |
| --- | --- |
| Material | Ultra Sil 30D nylon |
| Water Resistance | Non-PFC DWR finish |
| Compression Capacity | Up to 2/3 volume reduction |
| Compression Straps | Three (two ladderlock, one side release buckle) |
| Lid | Attached flip top |
| Color | Orange, Black |

## What Coreplex could not confirm

- Brand confirmation from the brand itself. The brand has not claimed this listing on Coreplex.
- Whether other stores sell this exact item. Coreplex only calls two listings the same item when they share a Shopify catalog ID or a barcode.
- Independent evidence for claims in the listing. Claims are the seller's own.
- A barcode (GTIN) for this listing. Without one, price comparisons with other stores are only possible through Shopify's own catalog grouping.
- Prices for the other options: the price above is for the option shown only.

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Source: Sea to Summit's public Shopify listing, read 2026-10-18. Cite as: Coreplex, "Ultra-Sil Compression Sack (Like New)", https://coreplex.ai/p/seatosummit.com/ultra-sil-compression-sack-used.html