Best Filament Dry Boxes for Moisture-Free Prints (2026)
Updated How we research
EIBOS Filament Dryer Cyclopes 2 Rolls, Adjustable Temp Max 70C, Humidity Sensor, Infinite Timer
EIBOS Cyclopes filament dryer for 2 rolls with adjustable temp up to 70C, a humidity sensor and an infinite timer.
SUNLU Filament Dryer S2, Black, 70C Max, Large Screen Control, For TPU PLA PETG ABS
SUNLU filament dryer S2 in black, 70C max with large screen control for drying TPU, PLA, PETG and ABS.
Decide between active heating and passive storage. Heated dry boxes actively drive moisture out of the spool with a controlled element, which is essential for thirsty materials like nylon, PA-CF, and PVA, while passive boxes with desiccant only maintain dryness once filament is already dry. Check the temperature range, built-in hygrometer accuracy, spool capacity, and whether a filament port lets you print straight from the box to keep it dry during long jobs. These guides help anyone seeing stringing, popping sounds, brittle prints, or a rough surface caused by damp filament. Hygroscopic engineering materials benefit the most, though even PETG prints cleaner when dry. A practical tip: a heated box that also feeds the printer solves both drying and storage in one unit, so prioritize a sealed filament outlet with a PTFE guide. Toss a reusable desiccant pack inside and watch the humidity readout, aiming to keep it well below 20 percent.
The short version
We compared 7 picks. Our scores range from 7.0 to 8.6 out of 10.
- Best overall:EIBOS Filament Dryer Cyclopes 2 Rolls, Adjustable Temp Max 70C, Humidity Sensor, Infinite Timer. Highest overall score in this guide at 8.6/10.
- Also great value:SUNLU Filament Dryer S2, Black, 70C Max, Large Screen Control, For TPU PLA PETG ABS. Value score of 9/10, overall 8.6/10.
- Solid build:SUNLU S2 Filament Dryer Box, 360 Surround Heating Adjustable Temperature Storage Box, Black. Build and materials score of 8/10, overall 8.4/10.
- Feature-rich:SUNLU Filament Dryer Box S1 Plus, Blue Grey, Built-in Circulation Fan, Storage Box 1.75 2.85 3.00. Features score of 8/10, overall 8.0/10.
Scores are our editorial assessment, not customer ratings. How we score
- 1.EIBOS Filament Dryer Cyclopes 2 Rolls, Adjustable Temp Max 70C, Humidity Sensor, Infinite Timer8.6/10See on AmazonCheck price
- 2.SUNLU Filament Dryer S2, Black, 70C Max, Large Screen Control, For TPU PLA PETG ABS8.6/10See on AmazonCheck price
- 3.SUNLU S2 Filament Dryer Box, 360 Surround Heating Adjustable Temperature Storage Box, Black8.4/10See on AmazonCheck price
- 4.SUNLU Filament Dryer Box S1 Plus, Blue Grey, Built-in Circulation Fan, Storage Box 1.75 2.85 3.008.0/10See on AmazonCheck price
- 5.SUNLU Filament Dryer Box S1 Plus, Black, Fan Design, PLA PETG ABS, Storage & Dehydrator8.0/10See on AmazonCheck price
- 6.EIBOS 3D Printer Filament Dryer Easdry Box with Fan, Adjustable Temperature, Humidity Control7.8/10See on AmazonCheck price
- 7.Upgraded SUNLU 3D Printer Filament Dryer Box, Filament Dehydrator, Holder, Storage Box, White7.0/10See on AmazonCheck price
#1EIBOS Cyclopes filament dryer for 2 rolls with adjustable temp up to 70C, a humidity sensor and an infinite timer.
Fit for the job 9/10 · Features and specs 9/10 · Build and materials 8/10 · Value 8/10
- + Holds 2 rolls, handy for dual-material or AMS printing
- + Max 70C covers PETG, TPU and many nylon drying needs
- + Infinite timer lets it act as a heated storage box while printing
- - 70C may be too low for fully drying some engineering filaments
- - Larger box takes more desk space than single-spool dryers
#2SUNLU filament dryer S2 in black, 70C max with large screen control for drying TPU, PLA, PETG and ABS.
Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 9/10
- + 70C max temperature handles common hygroscopic filaments
- + Large screen control makes setting time and heat simple
- + Listed support covers TPU, PLA, PETG and ABS
- - Single spool capacity limits multi-roll drying
- - Nylon and PC may need hotter, longer drying than it provides
#3SUNLU S2 filament dryer box in black with 360 surround heating, adjustable temperature and storage use.
Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10
- + 360 surround heating warms the spool more evenly from all sides
- + Adjustable temperature suits different filament materials
- + Works as a feeding storage box during long prints
- - Same S2 model as another listing, so compare price and bundle
- - Heating a full spool through takes several hours
#4SUNLU filament dryer box S1 Plus in blue grey with a built-in circulation fan, for 1.75, 2.85 and 3.00 filaments.
Fit for the job 8/10 · Features and specs 8/10 · Build and materials 7/10 · Value 9/10
- + Circulation fan speeds drying compared with the original S1
- + Supports 1.75, 2.85 and 3.00 filament spools
- + Doubles as a storage box that feeds filament while printing
- - Holds a single spool, so batch drying is slow
- - Clear lid lets heat escape faster in cold rooms
#5SUNLU filament dryer box S1 Plus in black with a fan design, a storage box and dehydrator for PLA, PETG and ABS.
Fit for the job 8/10 · Features and specs 8/10 · Build and materials 7/10 · Value 9/10
- + Fan design improves airflow for faster moisture removal
- + Black color option blends into dark printer setups
- + Storage and dehydrator in one box saves desk space
- - Single-spool design means one roll at a time
- - Check the max drying temperature for high-temp materials
#6EIBOS Easdry filament dryer box with a fan, adjustable temperature and humidity control for moisture-sensitive spools.
Fit for the job 8/10 · Features and specs 8/10 · Build and materials 7/10 · Value 8/10
- + Built-in fan circulates warm air for more even drying
- + Adjustable temperature suits PLA, PETG, TPU and nylon
- + Humidity control helps you see when a spool is dry enough
- - Single-spool size limits drying several rolls at once
- - Check the max drying temperature suits your filament types
#7Upgraded SUNLU filament dryer box in white, a dehydrator, holder and storage box for printing from a dry spool.
Fit for the job 7/10 · Features and specs 6/10 · Build and materials 7/10 · Value 8/10
- + Dehydrator function removes moisture that causes stringing
- + Holder design lets filament feed straight to the printer
- + Affordable entry point into filament drying
- - Check the max drying temperature before running it daily
- - Basic heating without a fan can dry spools unevenly
Before you buy: trade-offs we flagged
No pick is perfect. These are the main compromises we noted for the top products in this guide, so you can check they will not matter for you.
- 70C may be too low for fully drying some engineering filaments (EIBOS Filament Dryer Cyclopes 2 Rolls,...)
- Single spool capacity limits multi-roll drying (SUNLU Filament Dryer S2, Black, 70C Max,...)
- Same S2 model as another listing, so compare price and bundle (SUNLU S2 Filament Dryer Box, 360 Surround...)
- Holds a single spool, so batch drying is slow (SUNLU Filament Dryer Box S1 Plus, Blue Grey,...)
- Single-spool design means one roll at a time (SUNLU Filament Dryer Box S1 Plus, Black, Fan...)
- Single-spool size limits drying several rolls at once (EIBOS 3D Printer Filament Dryer Easdry Box...)
Frequently asked questions
›What is the best choice among filament dry boxes for moisture-free prints (2026)?
EIBOS Filament Dryer Cyclopes 2 Rolls, Adjustable Temp Max 70C, Humidity Sensor, Infinite Timer is our top overall pick. EIBOS Cyclopes filament dryer for 2 rolls with adjustable temp up to 70C, a humidity sensor and an infinite timer. It earns our score of 8.6/10, based on fit for the job, features, build and value.
›What is a good budget option?
SUNLU Filament Dryer S2, Black, 70C Max, Large Screen Control, For TPU PLA PETG ABS is the strongest low-cost pick in this guide. SUNLU filament dryer S2 in black, 70C max with large screen control for drying TPU, PLA, PETG and ABS.
›How much should I expect to spend?
Picks in this guide span See on Amazon price bands (roughly: $ = under $30, $$ = $30 to $100, $$$ = over $100). We never display exact prices because they change constantly, so the buttons above always show Amazon's current price.
›How were these products chosen?
We shortlist products that fit the job this guide solves and compare their published specifications, such as size, capacity, materials and what is included. Each pick gets an editorial score out of 10 for fit, features, build and value, and we write the pros and cons from those details. Our score is not an Amazon customer rating. We earn a commission if you buy through our links, which never affects the ranking.
Filament Print Lab independently selects every product; we may earn a commission from links above.
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