Fleece 11m x 7m Underlay

Quite thin but made from non-toxic, non woven fabric but plenty is supplied . In fact you can double it over to provide greater protection for the flexiliner. Received 6 bags for my 11m x 8m flexiliner:- , 3 bags of 11m x 5m underlay, and 3 bags of 11m x 8m underlay so plenty to cover our new pond area on the allotment.

Brilliant, very good product.

Very easy to fit. Looks thin but is tough and durable.

I'm not qualified to judge the quality of underlay.