Brand
Firmness explained, not asserted
Battle ropes and foam rollers.
The EPP roller is published as giving stable, even pressure without sinking in.
That is the whole mechanism of a firm roller: a soft one flattens under body weight, the contact spreads, and the pressure per square centimetre drops until the roller is a cushion. A firm one keeps its section.
Six rollers on that shelf are EPP for exactly this reason; this is the listing that explains it.
A hardness figure. No roller on that shelf gives one, so “medium-hard” can be read within a brand and not across brands.
3.8 cm, three-strand polyester blend, three lengths
A 12 m three-strand rope in a polyester blend, offered across the widest published length range here — 9, 12 and 15 m.
Best for: A space that can take a 15 m rope, or one that cannot take 12
A 30 × 15 cm medium-hard EPP roller stated to give stable, even pressure without sinking in, supplied with a carrying bag.
Best for: Trigger-point work where the roller must not flatten under the body
