Now Available in Standard & High Absorbency (HA)

B49 | B49HA: Large Starter Kits for Guitars, Basses & Large Instruments

Rated 4.8 out of 5 stars
13 Reviews


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Simplify humidity in your instrument case. Keeps large instruments like guitars in the ideal humidity zone for months while minimizing humidity fluctuations that can damage your instrument. This complete kit gets you started with your first set of Boveda and Boveda Leakproof Holders to add to your gig bag or hard case.



  • Guitar
  • Bass Guitar
  • Banjo
  • Cello
  • Double/Upright Bass
  • Bass Clarinet
  • Bassoon
  • Large Wooden Instrument

  • One (1) Double (2-Pouch) Boveda Leakproof Holder
  • One (1) Single (1-Pouch) Boveda Leakproof Holder
  • Three (3) Boveda Humidity Control Packets
  • Step-by-Step Instructions


  • ALWAYS insert Boveda into a leakproof holder before using in your instrument case. The holder acts as a liquid barrier if a packet is accidentally punctured and extends the life of your Boveda packets. The patented interior material allows water vapor to pass through to your instrument. The exterior is soft, like a polishing cloth, so it doesn’t scratch your instrument. 
  • DO NOT mix different Boveda RH levels including Boveda B49HA within the same instrument case.  
  • DO NOT use other humidification products with Boveda in the same case because they will fight against each other and reduce the efficiency of Boveda.

  1. Remove the clear overwrap from the packet. (DO NOT OPEN the Boveda itself.)
  2. Insert one (1) unwrapped Boveda into each pouch of each leakproof holder.
  3. Place in the case anywhere that allows for airflow and prevents puncture when you close the case.


Double holder:
- Into the sound hole
- Over the strings
­- Open area in the case

Single holder:
- Under the neck or headstock
- On the strings
- Under the tailpiece
- Open area in the case
  1. Close the case's lid. Always keep your instrument case closed when using Boveda.


Each Boveda in these kits is individually overwrapped. An unopened Boveda is good for up to two (2) years.


Each Boveda: 5.25"/13.3 cm x 3.5"/8.9 cm
Double pouch: Folded: 6.625"/16.83 cm x 4.25"/10.8 cm; Unfolded: 12.5"/13.75 cm x 4.25"/10.8 cm
Single pouch: 6"/15.24 cm x 4.25"/10.8 cm


Replace Boveda 2-way humidity packets every three (3) months.


Achieves and maintains a constant relative humidity (RH) range between 40% and 60%, the industry standard for wooden instruments.


Food-grade salt, purified water and a food-grade thickening agent sealed inside a leakproof membrane.

Our Customers Say

Rated 4.8 out of 5 stars
Based on 13 reviews
Total 5 star reviews: 11 Total 4 star reviews: 1 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
92%would recommend this product
13 reviews
  • CB
    Charles B.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    Guitar starter kit

    Excellent product.

  • WC
    William C.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    Boveda Test in Dry Montana Winter

    Montana winters are very dry. Depending on outside temps even with a whole house humidifier RH ranges from 19% to a max of 35%. In the past I have used Oasis but as they finally needed replacement I experimented with 49% Bovedas for three months. The results: For my D and OM Martins in the older Canadian Calton cases with two in sound hole and one at head excellent results with a pretty consistent 50+ over three full months. In wood Martin series 500 cases and a wood Collings case with two in sound hole and two at head RH was pretty consistent at around 37-40%. One interesting test result. I was taking care of a friend's D-18 in a new Austin Calton case where the RH maintained like the wood cases which was about 10% RH lower than the Canadian Caltons.

  • JT
    John T.
    Verified Buyer
    Rated 3 out of 5 stars
    2 months ago
    Starter kit for guitars & bass guitars

    I found the starter kit to be as user friendly as advertised, but was somewhat disappointed to find that the rh level reached in the cases for all guitars, with/or without the instruments was 44%. This was a great improvement over the rh in the room which ranged from 31% to 40% but missed the 49% target I was hoping to find. It is nice to not soak and squeeze all the sponges.

  • BW
    Brandon W.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    3 months ago
    Good product, great deal

    I’ve used Boveda before, used to sell them at a store I worked in so I knew they worked. After getting a couple new guitars I figured I should take care of them so the last a lifetime. This two pack was an amazing deal compared to anything else I could find online.

  • TJ
    Tom J.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    4 months ago
    This is a great product!

    Simple, easy to use and works perfectly. Customer for life. Thank you, Boveda for helping take great care of my instruments.

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