You might be surprised. I recently started using a new set of bag gloves and about the same time noticed I seemed to be getting tired really quickly. At first I chalked that up to the fact I've gotten used to wearing 10 oz bag gloves and my new ones are 16 oz. I didn't expect that to make all that big a difference (call me an optimist), but I was wrong because my hands feel like bricks with these new gloves on. After giving myself some time to adjust to the added weight, I was still finding I was getting tired a lot faster than I thought should be the case. Which probably says more about me than it does the gloves, but that's another story for another thread! The whole thing got me to thinking about how much difference the added weight makes and whether or not the labels on the gloves can be trusted. So I decided to conduct a few informal test using a very sensitive calibrated scale. The results are interesting. *Note: All tests were conducted on new (dry) gloves to eliminate moisture as a factor. RS2V High Performance Pro Sparring Gloves - Sparring Gloves - Rival Boxing Gear Inc. Rival RS2V Sparring Glove (16 oz) Right: 13.7 oz Left: 14.8 oz RS1 High Performance Pro Sparring Gloves - Sparring Gloves - Rival Boxing Gear Inc. Rival RS1 Sparring Glove (16 oz) Right: 14.3 oz Left: 14.9 oz RB10-d3o INTELI-SHOCK bag gloves - Bag Gloves - Rival Boxing Gear Inc. Rival RB10-d30 Gag Glove (10 oz) Right: 11.0 oz Left: 10.9 oz TITLE BLACK Boxing Gloves | Training/Sparring Gloves | Boxing Gloves from Title Boxing Title Black Training Glove (16 oz) Right: 13.7 oz Left: 14.3 oz TITLE BLACK Bag Gloves | Heavy Bag Gloves | Punching Bags from Title Boxing Title Black Bag Glove (16 oz) Right: 19.5 oz Left: 19.7 oz Reyes Hook & Loop Boxing Gloves | Reyes Boxing Gloves | Boxing Gloves from Title Boxing Cleto Reyes Training Gloves (16 oz) Right: 18 oz Left: 16 oz Just as I suspected, the labels on most gloves are pretty far off and shouldn't be taken at face value. The new Title Black bag gloves I recently bought are significantly heavier than the Rival d30 bag gloves I had been using previously. Nevertheless, the "10 oz" Rivals were actually 10.9 oz while the new Title Blacks in 16 oz size came in at a whopping 1.2 pounds each! No wonder these things were making me tired. I love the Title Black bag gloves, but they are HEAVY.