[Womble]

I like that. What are the dimensions of the nylon sheet (approximately)?

Hi PK, the sheet is roughly 1.5 x 1.5m. This was more by accident than design though, if I'm honest! 

Buttermilk - yes, I've been using an Ikea bag up until now, but I found it hard to stuff the hay into without the edges folding in. With this design, it's more likely to fall out of the ends if you're not careful, but getting it in there in the first place is really easy - just lay the sling down, pile hay on top and then pick up the straps.  It's also considerably bigger than an Ikea bag, which helps to cut down the number of trips to the hay feeder.

HTH!