49% Two-Way Humidity Control Packs for Music Instruments – 4 Pack – Standard Size – Prevents Warping & Cracking for Wooden Instruments– Humidifier Packs for Instrument Cases – Resealable Bag

I put these inside my Ukulele soft carry cases. I have to put two in each case to keep the humidity at about 45%. These work better than other methods I have tried for maintaining correct humidity inside the cases. My Ukuleles are solid woods of Koa or Acacia and it is important to keep the humidity at the proper level to prevent cracking of the woods.

This brand is the best I've used. Lasts long and works well.

I use these in my guitars. No more wet, spongy humidifiers for me! Best thing ever for my guitars and me.

Good system for providing moisture

I live in an extremely hot and dry climate in Phoenix, Arizona. I’ve used these Boveda 49% humidity packs for the past eight years with my expensive custom acoustic guitars…I’ve never had a single crack with any of my guitars which is very high praise for how well these work. You do have to keep an eye on, once they get hard and stiff feeling they either need to be replaced or a neat little trick is they can be recharged by placing them in Tupperware fill pour in sterilized water until the little bags are submerged and let it sit for about 2 to 3 days and they will recharge… then take them out, dry them out on a towel and they’re pretty much good to go for another 3 to 4 months of use. I’ve been doing this for a number of years and this method works quite effectively and saves a lot of $$$.

I use the 49% in my ukulele gig bags of assorted materials and they work a treat. I keep spares in the freezer and recharge the ones in use by placing them in a closed tuperware dish that holds a small dish of water to provide humidity to restore the bags (never allow the boveda pack to get wet!). This process takes time depending on how dry the boveda bag becomes- sometimes a week or more so it's good to have a few extra so you always have a well humidified instrument. I have zero leakage problems nor do they scratch instrument finishes.

works great!

A elegant solution to an age old problem. Leakproof and basically foolproof as long as you remember to replace every 90 days! Thank you again Boveda for another fine product!

👌

Ottimo!! Prodotto consogliato

Ich bin zufrieden… !

きっちり湿度をコントロールしたければBoverda一択だ．一見高い商品だが，予想よりもちがよい．また，湿度を保つケースに入れるより小回りが聞き，コスパはそれよりは良い．アマゾンで在庫切れになることがあり，その点は残念だ．特に冬場は湿度管理をしたい楽器が多く，必需品となっている．他の湿度を保つと言っている商品とは雲泥の差で優れている商品だ．お勧め．

冬の暖房下、アコギの乾燥から逆反りで困っていて、一月ほど指板と弦の間に２つ挟んで保管したら、ネックガ良い感じに戻りました。ナットやサドルやトラスロッドをいじる前にまずは、適切な湿度調整が必要だと実感。良いです。