Click the products to see the price. All nets (except "Pinky") are available in both polyester and Dyneema.
I recommend you to school your horse in using a SMHN or he might become frustrated before he has got the hang of it. Serve him a part of his regular serving in the traditional way and add the SMHN as a bonus. When he starts eating from the SMHN before he is out of hay on the ground you can stop the traditional feeding. If this makes him eat too much during the schooling period the best way is to exercise him more. If he has had free choice from round bales before and you want to introducing netted round bales experience has shown that it is best to make the first netted round bale available to the horses before the last "free" one is completely gone. We produce nets HD-Polyester and Dyneema. The polyester nets have proven them selves to be very durable and the Dyneema is almost indestrucible. Dyneema nets have a mesh size of 30mm (1 6/32") and are sold with 1 year unlimited waranty which mean that if the nets breaks within 1 year, of whatever reason, we will replace it.
The nets are made for hanging loose. I recommend you to reframe from stretching the nets hard since this will let your horse use all his power to pull the net and then nothing will hold up. The looser the net is hanging/swinging the harder it is for the horse to destroy it. This also makes it harder for the horse to eat too fast. Experience has proven these nets resist wear in a very good way.
The picture shows a polyesternet on a Dyneema net.