Baby OK/Secure-a-Sleep, sleep trainer. Blue & yel

This Secure-a-Sleep (now known as Baby OK), was used by my baby from 12 to 16 months. Stopped him migrating and banging into cot head. He was not compromised at all. Rolled easily. Improved his sleep vastly!! 1st photo is my item. 2nd is from website.
BLURB from Baby OK website.
"The one product is designed to fit 6-30 month infants. (Or from 3 months onwards with larger particularly active babies)
It is a superb infant "Sleep Trainer" - instills good sleep habits, because the infant learns that their bed is a place for lying down, not a place for standing or jumping.
Allows an infant to very comfortably roll from side to side, but makes it difficult for a young baby to roll onto its tummy. (Older infants will eventually gain the strength to roll onto their tummy, which by then is perfectly natural.)
Allows an infant to sit up after finishing sleeping (but it's virtually impossible for a toddler to stand up, climb out or fall out of the cot).
Makes it challenging for the infant to push its blankets off - and even if it succeeds, Baby still has an extra layer on to protect from the cold.
Being 100% cotton, it is designed for year-round use so it is totally suitable even on the hottest days.
Prevents infants moving "all around" the cot during their sleep, so helps stop them waking up unnecessarily due to their legs or arms getting stuck through cot bars, or from knocking their head on the head-board, or from getting tangled in their blankets.
It is designed to be portable and fit all cot sizes, all port-a-cots and standard single beds.
It replaces both top and bottom cot sheets.
It is designed with a special patent-pending reinforced construction for durability and manufactured in bold colours for practical daily use.
It secures a good night's sleep for the Parents (!) because their infant sleeps more soundly, and because the parents are confidently reassured in the knowledge that their infant is safe in bed. "