Need an advice for sleeping bags...

I'm french so please, forgive my english

I'm searching for a good sleeping bad in use to : 3 season sleep ( not winter )

Tarp / Hammock use.

And must be compact and cheap.

I've thinked of this 2

http://www.decathlon.fr/sac-de-couchage-rando-5-light-id_8242017.html#avantages

http://www.decathlon.fr/sac-de-couchage-rando-0light-id_8305075.html


I'd prefer the first one 'cause of his compactness

Advice ?

Saul' good man !