These are the best Poo Bags we have use and we've used a lot!
 
MADE USING LESS PLASTIC - Our dog waste bags are made from a unique blend of 30% recycled plastic and 20% OCEANEX. OCEANEX is a remarkable resin supplement which contains powdered oyster shell waste from a sustainable source. Adding waste seashell means our bags can be made with less precious oil-based polymer and the replacement material is bio-renewable too!
LARGE & STRONG - Approximate Size: Length 37 cm, Width 17.5 cm with a 5 cm gusset on each side allowing your dog poo bag to open extra wide to tackle any sized doggie delight. These bags are 15 MICRON in thickness, a sturdy choice Large 100% Leak proof Unscented Bags making picking up easy and hygienic with no nasty accidents.
EASY TIE HANDLES FOR AN EASY LIFE - These bags are not on a roll but come as individual bags in packs of 100's.