ECO-FUSEDECO-FUSED Deodorizing Balls for Sneakers, Lockers, Gym Bags - 8 Pack - Neutralizes Sweat Odor - Also Great for Homes, Offices and Cars - Easy Twist Lock/Open Mechanism - Oriental Flower

I use these in ski boots and so far have found them very effective. They arrived when they said and have had no issues with product or seller.

Good value for an effective set of kit which is certainly needed with the odour that trainers in the summer can produce!!...How long they stay effective remains to be seen.

Love the fact that it is eco friendly and you can open and close them when you want, the smell is not over powering chemical smell but quite pleasant.

Very useful to have it and especially if you travel. Its It's simple to use and helps to retain the odour. The scent is alright not too strong but enough for the particular shoes.

The product is as described, my son has football and rugby boots that smell pretty bad. You twist open the ball and place them inside the boot. The smell of the ball is pleasant but unfortunately it is not strong enough to over power the smell of the boots! I also found that once opened the smell didn't last long.

They are ok. The smell is not great but better than my son’s stinky trainers.

Smell really good but have no impact whatsoever on the shoes that you put them in! Couldn’t sense any freshness in the shoes at all despite leaving them in for over a week.

Very good