【Background】 When it comes to toothbrushes for ultralight (UL) mountaineering, the standard choices are either Japanese brands with travel cases or American brands that are short and light but have large brush heads. I personally use the Muji "Replaceable Head Toothbrush" for mountaineering, and since many other mountaineers use the same, I created a dedicated storage case & adapter that allows you to create your own lightweight toothbrush set by combining Muji items. 【Features】 ● Designed to neatly fit the Muji "Replaceable Head Toothbrush" body, replacement heads, and "Medicated Whitening Toothpaste 10g." ● Further weight reduction is possible by switching to "tablet" toothpaste. The included tablet case can store 7 Muji "Toothpaste Tablets." The tablet case also functions as a short handle with a dual-function design. ● Includes a toothbrush cap made of soft, glow-in-the-dark TPU material, also used for smartphone cases. Compatible with the "Regular" size of the "Partial Cleaning," "Regular," and "Wide" head types. The cap protects the brush from pressure in your backpack and prevents the bristles from deforming. ● Can also be used with the kodamaya Feather Brush, in addition to Muji toothbrushes. 【Specs】 ・Set Contents and Weight: DCF case approx. 5.6g, Toothbrush cap approx. 1.8g, Tablet case 6.2g ・DCF Case Size: Length approx. 120mm × Width approx. 36mm × Depth approx. 22mm ・Materials: DCF 1.43oz (Dyneema Composite Fabric), PETG, TPU ※Reference Weights: Muji Replacement Head 3.0g, Muji Handle Body 12.1g, Muji Medicated Whitening Toothpaste 12.4g, Muji Toothpaste Tablets (including product bag) 3.6g (7 tablets) 【Notes】 ・The items for sale are a set of 3: "DCF Case / Toothbrush Cap / Tablet Case." Toothbrush and toothpaste are not included. ・Please refrain from price negotiations. ・No individual sales. ・Will be shipped in simple packaging.