# Best Filament Dry Boxes for Moisture-Free Prints (2026) Source: https://filamentprintlab.com/best/filament-dry-boxes Updated: 2026-09-15 Publisher: Filament Print Lab. Our score is an editorial rating out of 10 (fit 35%, features 25%, build 20%, value 20%), not a customer rating. Method: https://filamentprintlab.com/how-we-research#our-score 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. ## Picks ### 1. EIBOS Filament Dryer Cyclopes 2 Rolls, Adjustable Temp Max 70C, Humidity Sensor, Infinite Timer Our score: 8.6/10 (Fit for the job 9/10 · Features and specs 9/10 · Build and materials 8/10 · Value 8/10) EIBOS Cyclopes filament dryer for 2 rolls with adjustable temp up to 70C, a humidity sensor and an infinite timer. Pros: - 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 Cons: - 70C may be too low for fully drying some engineering filaments - Larger box takes more desk space than single-spool dryers Details: https://filamentprintlab.com/product/B0BFQXHRV5 ### 2. SUNLU Filament Dryer S2, Black, 70C Max, Large Screen Control, For TPU PLA PETG ABS Our score: 8.6/10 (Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 9/10) SUNLU filament dryer S2 in black, 70C max with large screen control for drying TPU, PLA, PETG and ABS. Pros: - 70C max temperature handles common hygroscopic filaments - Large screen control makes setting time and heat simple - Listed support covers TPU, PLA, PETG and ABS Cons: - Single spool capacity limits multi-roll drying - Nylon and PC may need hotter, longer drying than it provides Details: https://filamentprintlab.com/product/B09PMPFXJG ### 3. SUNLU S2 Filament Dryer Box, 360 Surround Heating Adjustable Temperature Storage Box, Black Our score: 8.4/10 (Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10) SUNLU S2 filament dryer box in black with 360 surround heating, adjustable temperature and storage use. Pros: - 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 Cons: - Same S2 model as another listing, so compare price and bundle - Heating a full spool through takes several hours Details: https://filamentprintlab.com/product/B09WQLH1PQ ### 4. SUNLU Filament Dryer Box S1 Plus, Blue Grey, Built-in Circulation Fan, Storage Box 1.75 2.85 3.00 Our score: 8.0/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 7/10 · Value 9/10) SUNLU filament dryer box S1 Plus in blue grey with a built-in circulation fan, for 1.75, 2.85 and 3.00 filaments. Pros: - 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 Cons: - Holds a single spool, so batch drying is slow - Clear lid lets heat escape faster in cold rooms Details: https://filamentprintlab.com/product/B08ZHTMZ8G ### 5. SUNLU Filament Dryer Box S1 Plus, Black, Fan Design, PLA PETG ABS, Storage & Dehydrator Our score: 8.0/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 7/10 · Value 9/10) SUNLU filament dryer box S1 Plus in black with a fan design, a storage box and dehydrator for PLA, PETG and ABS. Pros: - 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 Cons: - Single-spool design means one roll at a time - Check the max drying temperature for high-temp materials Details: https://filamentprintlab.com/product/B09HJL95RH ### 6. EIBOS 3D Printer Filament Dryer Easdry Box with Fan, Adjustable Temperature, Humidity Control Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 7/10 · Value 8/10) EIBOS Easdry filament dryer box with a fan, adjustable temperature and humidity control for moisture-sensitive spools. Pros: - 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 Cons: - Single-spool size limits drying several rolls at once - Check the max drying temperature suits your filament types Details: https://filamentprintlab.com/product/B0BKFMZQHB ### 7. Upgraded SUNLU 3D Printer Filament Dryer Box, Filament Dehydrator, Holder, Storage Box, White Our score: 7.0/10 (Fit for the job 7/10 · Features and specs 6/10 · Build and materials 7/10 · Value 8/10) Upgraded SUNLU filament dryer box in white, a dehydrator, holder and storage box for printing from a dry spool. Pros: - Dehydrator function removes moisture that causes stringing - Holder design lets filament feed straight to the printer - Affordable entry point into filament drying Cons: - Check the max drying temperature before running it daily - Basic heating without a fan can dry spools unevenly Details: https://filamentprintlab.com/product/B08V8N9ZL5 As an Amazon Associate I earn from qualifying purchases.