What the cover is actually protecting against
Three different problems get called “edge damage”. Edges grinding against each other inside a travel bag. Tips chipping against a roof rack or a van wall. And water sitting on an edge between trips, which is a storage problem rather than an impact one.
A protector solves the first two. The third is solved by drying the ski, not by a thicker cover.
3 mm: retail and light travel
Three millimetre SBR stays supple, folds flat and adds little to the packed size. For a single pair travelling in a padded bag, it separates the edges and protects the topsheet without making the bag harder to close.
5 mm: rental, vans and stacked transport
Five millimetre material is for the cases where skis are stacked, thrown into a coach hold or handled by staff who will not treat them gently. The extra thickness absorbs a knock that would otherwise reach the edge, and it keeps its shape when the cover is pulled on and off all day.
| Use | 3 mm | 5 mm |
|---|---|---|
| Retail single pair | Good fit, packs flat | Over-specified |
| Rental and school fleets | Wears at the tip first | Right choice |
| Stacked transport | Limited protection | Absorbs knocks |
| Packed size | Small | Noticeably bulkier |
Sizing and binding
Size the cover by the waist width of the ski it will sit on, not by the model name. A cover that is too narrow rolls up at the edge and exposes the part it was bought to protect.
Elastic binding keeps the cover on during handling and is the usual choice for fleets. A stitched and turned edge looks better on a retail shelf. Both are sewn in the same department, so the choice is about the buyer, not about the line.
How to test a sample
Put the cover on the widest ski in the range, drop it into the bag with a second pair, and carry it by the handle for a minute. If the cover rolls or the tip slips out, the thickness is not the problem — the size or the binding is.