Viper Cores Inner Sleeves

Description

Viper Cores Inner Sleeves — 100-Count Pack

Viper Cores are our standard inner sleeve, cut from 100% acid-free, PVC-free polypropylene at 64mm × 89mm with a thin 0.05mm-per-side wall. They’re built to sit snugly under an outer sleeve without adding bulk to your deck.

A Snug Fit That Doesn’t Add Bulk

Because the polypropylene is thin and consistent from sleeve to sleeve, a deck double-sleeved with Viper Cores underneath still shuffles smoothly instead of feeling stiff or oversized. The acid-free, PVC-free construction also means the sleeve won’t react with or damage the card over time.

Complete Your Sleeving Setup

Pair these inners with a set of Snakeskin matte outer sleeves for full double-sleeve protection, and store the finished deck in one of our deck boxes.

What’s Included

• 100 Viper Cores Inner Sleeves
• 100% Polypropylene, acid-free & PVC-free
• 64mm × 89mm, 0.05mm per side

Frequently Asked Questions

Are these meant to be used alone or with an outer sleeve? They work either way, but they’re designed as the inner layer of a double-sleeve setup, paired with a Snakeskin or other outer sleeve.

Will double sleeving with these make my deck feel bulky? No — the thin 0.05mm-per-side wall is built specifically to avoid adding noticeable bulk under an outer sleeve.

Do you sell these in bulk? Yes — see our case of 50 packs for 5,000 sleeves at once.

For more on how double sleeving fits into deck protection generally, see Wikipedia’s overview of the collectible card game format.

Caring for Your Sleeves

Keep sleeves away from excess heat and humidity, which can warp polypropylene over time, and store sleeved cards upright rather than under heavy, uneven pressure.

Why Players Choose Viper Cores

Viper Sleeves is a family-run team based in Mesa, Arizona, and Viper Cores exist for players who want double-sleeve protection without the bulk. It’s the inner sleeve we build our own double sleeve kits around.