To optimize the storage and organization of your luggage,there is nothing like resorting to dedicated internal bags,which meet almost all needs.
Multi-compartment bags
Multi-compartment bags allow you to store small objects and organize your luggage by function (including toiletry kit, pharmacy, writing, small electronics functions). They open with a zip. Some have snaps on the sides so that you can close the double compartment and make them more compact, and a plastic hook to attach them to internal straps. They are usually made of polyamide or Mesh.
Price: about 20€.
Shoe bags
Shoe bags help protect your clothes and the inside of your luggage from dirty or muddy shoes. These bags are stretched bellows,made of plastic fabric covered with a net,preventing liquids and dust from spreading.
Price: about 15€.
Compact toiletries
There is an offer of compact and lightweight toiletries on the market. They usually have mesh pockets, zipped compartments,and a strap for transport or a suspension hook. Some have an elastic band with elastic passers-by to hold the toiletries and the toothbrush, very useful. As an accessory, you can also find some equipped with an interior mirror. Before purchase, check that the toiletry kit is compatible in dimension with your usual products,some such as existing deodorants in mini format, others limited to certain volumes. Choose a stain-resistant and waterproof fabric, made of cordura for example.
Price: 15€.
Clothing covers
Ultralight clothing covers with zipped net flap allow you to organize and optimize your suitcase. You will find them in different dimensions,and suitable for example for shirts with a Velcro fit, and for underwear as well. They can be skillfully supplemented by a cover dedicated to dirty laundry.
Price: about 25€.
Anti-shock covers
There are soft, shockproof and ultralightstorage boxes. They help protect your fragile objects. The material is usually EVA.
Price: about 30€.
Cell-case covers
These cases help protect your phone or camera. The interior is usually lined with felt; they are widely zipped on half of the perimeter. Some have fasteners to attach to the straps of your backpack.
Price: 15€.
"Vacuum" bags or vacuum compression
These bags are ideal for carrying items that can be compressed,such as underwear; completely waterproof, they have an air valve that allows to evacuate the air present inside while rollingthem, and to reduce their volume from two thirds to 80%. They exist in different dimensions. They can be reusable many times. They are usually made of reinforced nylon or polyethylene.
Price: 25€ approximately.