Matze's Booster Balls have the property of releasing the valuable ingredients of the boilies more quickly into the water. This makes the Booster Balls all the more effective in attracting fish from a large radius to the fishing spot. Especially in spring, however, it is extremely dependent on the weather conditions which bait size the carp prefer. If it is still relatively cold then you are usually right with 15mm boilies, but when it gets warmer the fish prefer larger baits. By mixing 15 and 20mm you are always flexible. Another big plus is the extra soft consistency of the booster balls. On the one hand, they release more flavour and on the other hand, suspicious ruffe are much more likely to suck them in than hard boilies. Therefore, these boilies are ideal for spring and for waters with high fishing pressure. Supplied in resealable stand-up pouches. Boilie size: 15 + 20 mm. Contents: 1 kg.